Lea, Wills & Ryan (2006)
An attempt to run, in pigeons, the human experiments that would eventually be reported in Wills et al. (2020). This did not work particularly well; Stephen Lea did a great job of making the most of what we had.
Lea, S.E.G., Wills, A.J., & Ryan, C.M.E. (2006). Why are artificial polymorphous concepts so hard for birds to learn? Quarterly Journal of Experimental Psychology, 59, 251-267.
Published: 13 July 2005.
- ALCS entry: Sept 2013.
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